Conveyor-Based 3D Printing for Multi-Material Layer Recovery
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Solution Overview
Problem
Existing 3D printing methods for multilayer components with different materials are inefficient and costly due to excess raw material usage and the inability to print multiple layers in a single operation without material mixing or complex cleaning processes.
Innovation Solution
A 3D printer with separate dispensers and recovery devices for each raw material, allowing for selective application and recovery, and a conveyor belt for flexible material transport, enabling the printing of multilayer components with different materials in a single operation while maintaining material purity and reducing waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single dispenser and single recovery device are used, then device complexity is reduced, but different raw materials cannot be selectively applied and recovered without mixing
Solution Approach 1:
The system divides the raw material supply and recovery into separate segments, with each dispenser and recovery device dedicated to a specific raw material type. This segmentation prevents material mixing while enabling multi-material printing capability.
Solution Approach 2:
Multiple dispensers and recovery devices share common functional pathways (conveyor belt, building plate, irradiation system), allowing the system to handle different materials through standardized interfaces while maintaining material-specific control.
2Loss of substance
If excess raw material is not recovered, then the printing process is simpler, but material waste increases and cost rises
Solution Approach 1:
The system implements recovery devices that collect excess raw material from the conveyor belt and return it to the respective dispensers, transforming waste material back into usable resource and reducing material loss.
Solution Approach 2:
The recovery system creates a feedback loop where excess material is collected, processed, and fed back into the dispensing system, enabling continuous material utilization and reducing waste.
3Reliability
If the entire printer is cleaned for material changes, then material purity is maintained, but printing time and productivity decrease
Solution Approach 1:
The system segments material handling into separate dispensers and recovery devices, allowing material changes at the dispenser level without requiring complete printer cleaning, thus maintaining purity while enabling faster material transitions.
Solution Approach 2:
The recovery devices continuously collect and prepare excess material for reuse, pre-processing material transitions before they are needed, reducing the time required for material changes and maintaining productivity.
4Reliability
If multiple raw materials are applied without separate recovery, then device complexity is reduced, but material mixing occurs and material purity is compromised
Solution Approach 1:
The system assigns separate recovery devices to each raw material type, creating distinct recovery pathways that prevent material mixing while maintaining high material purity for each material stream.
Solution Approach 2:
Each recovery device is optimized for recovering its specific material type with appropriate parameters and characteristics, ensuring high purity recovery for each material while allowing the overall system to handle multiple materials.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient and cost-effective additive manufacturing of multilayer components with different materials by recovering and reusing excess raw material, reducing waste and simplifying the printing process, allowing for flexible and resource-saving production.
Implementation Method 1
a coating device that deposits a layer of raw material onto the conveyor belt
Implementation Method 2
The manufacturing process here is an additive photopolymerization process
Implementation Method 3
The raw material, which is photosensitive in this case, then cures by photopolymerization of a binder it contains
Data Source
AI summary
A 3D printer for additively manufacturing a multilayer component. The 3D printer includes at least two separate dispensers coating a conveyor belt with respectively different raw material, a manufacturing unit in which at least part of the raw material is added to the component as a new layer, at least two separate recovery devices for selectively recovering the respectively different raw material, which is not consumed when a layer is added to the component, and for returning the raw material to the respective associated dispenser, and conveyor belt that transports the raw material from the dispenser to the manufacturing unit and further to the recovery device in the lateral direction.